[PATCH 28/34] drm/i915: Start using vm lists

[Ben Widawsky <ben@bwidawsk.net>]

It's easy enough to test and make sure our list is accurate because we
already have a member in place to access our global GTT. By porting that
to use our list (which assumes the GGTT is always the first entry) we
can verify a decent amount of the code is working correct.

NOTE: to do this, we must initialize the list quite early.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_dma.c | 4 ++++
 drivers/gpu/drm/i915/i915_drv.h | 5 ++++-
 drivers/gpu/drm/i915/i915_gem.c | 4 ----
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index b36be25..260d6ba 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1518,6 +1518,10 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
 
 	i915_dump_device_info(dev_priv);
 
+	INIT_LIST_HEAD(&dev_priv->vm_list);
+	INIT_LIST_HEAD(&dev_priv->gtt.base.global_link);
+	list_add(&dev_priv->gtt.base.global_link, &dev_priv->vm_list);
+
 	if (i915_get_bridge_dev(dev)) {
 		ret = -EIO;
 		goto free_priv;
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 31bd475..08eb41c 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -480,7 +480,10 @@ struct i915_gtt {
 			  unsigned long *mappable_end);
 	void (*gtt_remove)(struct drm_device *dev);
 };
-#define i915_gtt_vm ((struct i915_address_space *)&(dev_priv->gtt.base))
+#define i915_gtt_vm ((struct i915_address_space *) \
+		     list_first_entry(&dev_priv->vm_list,\
+				      struct i915_address_space, \
+				      global_link))
 
 struct i915_hw_ppgtt {
 	struct i915_address_space base;
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 572b386..eed2ef6 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4196,10 +4196,6 @@ i915_gem_load(struct drm_device *dev)
 				  SLAB_HWCACHE_ALIGN,
 				  NULL);
 
-	INIT_LIST_HEAD(&dev_priv->vm_list);
-	INIT_LIST_HEAD(&i915_gtt_vm->global_link);
-	list_add(&i915_gtt_vm->global_link, &dev_priv->vm_list);
-
 	INIT_LIST_HEAD(&i915_gtt_vm->active_list);
 	INIT_LIST_HEAD(&i915_gtt_vm->inactive_list);
 	INIT_LIST_HEAD(&dev_priv->mm.unbound_list);
-- 
1.8.2.3